Delhi Police Constable 2008 Paper

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Question : 86 of 100

Marks: +1, -0

How much time will a car, running at a speed of 10 m/sec, take to cover a distance of 81 km ?

2 hours 20 min
2 hours
2 hours 15 min
2 hours 30 min

Solution:

Speed

=10\;\m{/}\s=10 × \;{18}/{5}=36

i.e., time

=81/36\hr=9/4=2\hr.15

min

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